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MAGHINE POR MAKING SAND'GORBS.l No. 365,724. Patented June 28, 18'87.

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W/w f j "UNITED STATES PATENT OEEICE.

GEORGE A. BOWEN,v or MEDINA, NEW YORK.V

VlVlACHlNE FOR MAKING SAND CORES..

SPECIFICATION forming part of Letters Patent No. 365,724, dated June 28,1887.

Application filed February 5, 1887. Serial No. 226,727.

To all whom t may concern:

Be it known that I, GEORGE A. BOWEN, of Medina, in the county of Orleans and the State of New York, haveinvented an Improvement in Machines for Making GreeniSand Cores for Cast-Iron lipe and other Metal Castings, of which the following is a full description, reference being had to the accompanying drawings, forming a part of this specticaton.-

Figure lis a transverse section. Fig. 2 is an end view. Fig. 3 is a longitudinal section of the hopper, showing the inside distributing plates or feeders.

A represents the cud of the hopper, which is a triangular-shaped box converging downward, at the bottom of which is a narrow opening for the discharge of sand. Inside and at the bottom of the hopper is a revolving rod, B, on which and over which the sand is earried to the opening of the hopper. Inside and on either ofthe inclined sides of the hopper are iron plates G C, one of which has teeth out in the lower edge somewhat resembling saw-teeth. These plates are connected at one end with a shaft, D, by means of the connecting-rods E. This shaft has a double elbow or eccentric on opposite sides, which, by means of the pulley F, is made to revolve, thereby giving these plates alternate and opposite motions. There are also attached to the plates short rods or pins c,'standing in a perpendicular direction upward through the sand in the hopper. The alternate backward and forward motion given to the plates C C by the connectingrods E from the double crank or elbow on the revolving shaft D stirs the body of sand, prevents packing, and, in combination with the revolving rod B, operated by the pulley G, delivers it freely and evenly through the opening in the hopper.

Directly under the hopper is a plain cylinder, I-I, which, by means ot' thepulley I, is made to rapidly revolve, thereby throwing the sand with much force forward and downward as it falls on its face from the hopper above. In front of and somewhat lower than this cylinder is an arbor or core-bar, J, of a suitable size and length to form the required core, supported in proper bearings and supplied with a pulley or crank to give it the requisite ro- (No model.)

tary motion. a and b are pulleys on countershaft, with belts running to pulley I on cylin der and to pulley G on thehopper-rod. 'e is also a pulley on counter-shaft, with belt running to pulley F on shaft D, for moving alternately the hopper-plates G C.

When the machine is in operation, the sand in the hopper is moved by the alternate motion of the plates C C and the upright rods or posts c', thereto attached7 and is sifted upon the revolving rod B, by means of which it is evenly discharged from the hopper and falls upon the rapidly-revolvingcylinder H, from which it is thrown forward and downward upon the core-bar J with sufci'ent force to pack and form the core. In front of this core-bar is an adjustable knife, K, by means of which the coreis cut or turned down to the required form and size.

I am aware that winged wheels have been and are now in use to throw sand from the sand box or hopper to the core-bar for forming cores; but the sand falling on the winged wheel strikes the revolving wings at different angles, and is thrown with unequal force, and consequently is so badly scattered that only a small portion falls upon and adheres to the core-bar. kThe larger part, being scattered, must be taken up and again elevated into the hopper, making much useless labor.

A delecting or'guiding board is sometimes used; but the unequal force given to the sand by the winged wheel causes the sand to pack unequally on the core-bar and often results in imperfection and failure. Inmy machine the plain cylinder gives a rapid, compact dow of sand with equal force, and with proper adjustment nearly all the sand lodges upon the core-bar. Cores are also made by elevating the hopper and relying upon gravitation or weight of the sand to pack upon the core-bar as it falls; but in my machine more force is gained and more rapid work done. It also admits placing the hopper lower, thus saving much labor consequent upon shoveling the sand into an elevated hopper.

The machine is also constructed in a more compact form by placingthe corebar nearer to the hopper.

Having thus described my invention, what IOO I claim, and desire to secure by Letters Pat' the sliding plates C C, the revolving rod B,

ent, is- Y L s the cylinder H, and the eore-barJ, substanzo 1. In combination with a hopper, the slidtially as and for the purpose described.

ing plates G C, combined with the double D elbow or crank shaft; D and the eonnectingy GEORGE A' BOXVEN" rods E, substantially as and for the purpose Vibnesses: described.

E. A. BOWEN, 2. The combination of the hopper A with GEO. A. BEACH. 

